Replacement filter elements for shower head filtration, set of 12. The mineral stones in the flow filtration can be replaced with this PP polypropylene cotton filter to absorb dirt, dust, and other harmful substances in the water, removing impurities from shower water and monitoring water quality. Easy to install, compatible with detachable handheld showerheads; simply unscrew the bottom part of the body and insert the filter cotton. If your showerhead is shorter, you can also remove the blue cap from the filter cotton and install it at the shower water inlet. It is recommended to replace it every 4-6 weeks depending on water quality. Material: PP Color: White Size: 8.5 x 2.5 cm Water Inlet Thread: 4-point water inlet Note: Please check the size before purchasing; the total length is 8.5 cm (as shown in the picture). Package Contents: 12 x Filter Elements. The above package content is for filter elements only; other products are not included. Note: Light reflection and different monitors may cause the color of the item in the picture to differ slightly from the actual item. The allowed measurement error is +/- 1-3 cm.